I may have missed the topic, and if I did I apologize, but.... I guess my age is catching up with me. Or that tight gnarley knot in the middle of my back must be answered. Everyone tells me that the answer is a backrest. Well, which one? I've got a Rick Mayer seat on the bike, and he doesn't make a backrest for the GS only the RT. SOoooo...long story short....anyone have any suggestions?